发布于：2025-07-06 05:43浏览量：187文/优校网
1.【动】礼节,环节
2.【解】原节,原椎,初椎
1.one of a series of paired blocks of cells that develop along the back of a vertebrate embryo, giving rise to the vertebral column and most of the skeletal muscles
2.a body segment, usually one of several, into which the bodies of some animals such as earthworms and crayfish are pided along their length